Why is the website 'uisides.org' asking me for a PIN number after I sign up for
eResponse?

You will only see this screen if you have no eResponse claims to fill out. Any pending
unemployment requests at the time you sign up for eResponse will have to be completed
by mail or fax. Any subsequent claims will be available on eResponse, and you will
be automatically logged in to uisides.org without needing a PIN.